Mine-car brake.



H. D. SCOTT.

MINE CAR BRAKE.

APPLICATION FILED JUNE 29. 1915.

Patented Oct. 5, 1915.

WITNESSES A TTORNEYS v To all whom it, may concern:

hurrah s'ra'ras PATENT, OFF C HENRY :oow soon, or SHERIDAN, WY 'OMING.

MINE-CAR BRAKE.

Specification of Letters Patent. Patented Oct, 5, 1915.

Application filed June 29,1915. Serial No. 36,996.

Be it known that I, HENRY D. Soorr, a citizen of the United States, and a resident of Sheridan, in the county of Sheridan and State of Wyoming, have invented a new and Improved Mine-Car Brake, of which the following is a full, clear, and exact description.

This invention relates to brakes for mine cars or the like and has particular reference to that class of devices shown and claimed in Letters Patent of the United States issued to Riley McClaskey, on November 25, 1913, No. 1,079,570, and since duly assigned to me.

Among the objects, therefore, of this present invention is to improve that class of brakes adapted especially for mine cars whereby they are rendered more effective and serviceable than previous devices.

WVith the foregoing and other objects in view, the invention consists in the arrangement and combination of parts hereinafter described and claimed, and while the inven' tion is not restricted to the exact details of construction disclosed herein, still for the purpose of illustrating a practical embodiment thereof reference is had to the accompanying drawings, inwhich like reference characters designate the same parts in the several views, and in which Figure 1 is a side elevation of a mine car equipped with my improvement; Fig. 2 is a vertical transverse section on the line 22 of Fig. 1.; Fig. 3 is a perspective View of one of the holders or bearing brackets; and Fig. 4 is a similar View of one of the brake blocks.

Referring more particularly to the drawings, I show at 10 a car body having wheels 11. The car wheels are mounted upon axles 12 and may be journaled thereby on the bottom of the car body in any suitable and substantial manner well known in the art. Between each pair of wheels on the Sides of the car body is secured a holder or bearing bracket 13 comprising a fiat plate 14: bolted or otherwise rigidly secured against the outer vertical side of the body and projecting below the same forming a cylindrical bearing 15 for one end of the rock shaft 16, the ends of which at least are preferably formed rectangular in cross section, although for convenience the entire rock shaft may be made of uniform cross section. In addition to the plate 14, each holder comprises an integral horizontally extending bracket 17 terminating in forwardly and rearwardly projecting lugs 18. Adjacent .one end of the body is pivotedat l9 a lever 20 0f the second class adaptedto rest nor mally and idly. upon a catch 21 just above a toothed segment 22.

whereby the action of the arm is most rigid and effective. A bar 25 is pivoted at one end at 26 to the lever 20 and at its other end is connected to anadjustable eyebolt 27 secured to the upper end of the arm 24.

28 indicates brake blocks arranged in pairs, one block for each wheel, each block including a shoe 29 and a hanger 30. The hangers are suspended from the lugs 18 of the holder brackets, and while the lever 20 is held in its idle position upon the catch 21, g g

the brake shoes hang free from the peripheries of the wheels and are ineffective to resist the rotation thereof. The cams 23, however, lie between and in contact with the hangers 30 of each pair of brake blocks and limit the movement thereof away from the respective wheels. It follows, therefore, that when. the lever 20 is thrown from and beneath its catch 21 along the quadrant 22, the arm will be drawn to cause rotation of the rock shaft and will cause the cams to forcibly apply the brake shoes to all of the wheels simultaneously. I The construction is very simple and yet highly eflicient consider-- ing the rough usage to which machines of this character are necessarily subjected in practice.

At 31 and 32 I show a pair of collars surrounding the rock shaft just within and against the cams 23. One of the collars fills the space between the adjacent cam' and the arm 24. The other collar fills the entire space between its cam and the adjacent holder plate 14. These collars serve in connection with the cams to prevent longitudinal movement of the rock shaft and hence serve to hold the cams directly between their respective pairs of wheels. The greatest efliciency also is had by arranging the rock shaft in the same horizontal plane as the two wheel axles. The cams 23 are preferably provided with flanges 23 which overlap the brake blocks far enough to prevent lateral swinging movement or displacement of the blocks, thus insuring prompt and proper operation of the brake devices.

I claim In a device of the character set forth, the combination with a vehicle body, a pair of axles supporting the same, and a pair of wheels on each end of the pair of axles, of a rock shaft midway between and parallel to the axles and in the same plane thereof, a pair of holders secured to the vehicle body, one holder being between each pair of wheels and comprising a flat plate extending below the body and forming a bearing for one end of the rock shaft, each holder also including a horizontally extending bracket having forwardly and rearwardly projecting lugs, a pair of cams secured nonof brake blocks between each pair of wheels 30 and suspended from said bracket lugs and in constant contact with said cams, and a pair of spacing collars on the ends of the rock shaft having their outer ends contacting with the cams, one of the collars being shorter than the other and bearing against said arm, said collar serving to hold the rock shaft from endwise movement maintaining the cams in the planes of the respective pairs of wheels.

HENRY DOW SCOTT. Witnesses:

A. N. WAYMARK, L. B. HANSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

